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Synthesis and Structure of Pyrochlore-Type Bismuth Titanate

✍ Scribed by I. Radosavljevic; J.S.O. Evans; A.W. Sleight

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
211 KB
Volume
136
Category
Article
ISSN
0022-4596

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✦ Synopsis

Bismuth titanate with the pyrochlore structure has been prepared for the first time. This phase does not exist in the Bi 2 O 3 /TiO 2 equilibrium phase diagram, but has now been prepared by a low-temperature synthesis route with a final calcination temperature of 600Β°C. Structural analysis of pyrochlore bismuth titanate was performed using both synchrotron X-ray and neutron powder diffraction data. The cubic cell edge is 10.357 A s , and the composition based on the refinement of the structure is Bi 1.74 Ti 2 O 6.62 . The Bi 3Ψ‰ cations are displaced off the three-fold axis by 0.38 A s in a disordered manner.

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